Easy one -
Models -especially larger models with very low wing loadings- fly pretty well in an EXTREMELY wide and forgiving CG envelope.
The newcomers see-then ask "where is the CG?"
the answers are varied - yet the newcomer sees that those models still seem to fly well .
How could that be so?
Relative to full scale - where CG can make or break a craft with critical wing loadings and very restrained control authority and marginal power, these models can be flown into absurd flight configurations and recovered with extreme power and huge throws.
If - Ollie -you have eve flown a full scale Ercoupe--you se an example of a design which is extremely easy to fly (I love em) yet can kill a thoughtless pilot -who trys to fly it outside the original design parameters. That full scale craft had to kept in the design envelope as the controls were very limited and power was enough to do the design job- that's it.
I had a TOC entrant borrow a model for practice -and the prop broke off at the hub- one blade only - which wrenched the entire forward fuselage from the model.
He actually landed it - using full down elevator and doing rapid aileron recoveries .
We patched it up an back it went to the practice field.
The CG was at the TE of the wing (a straight TE swept LE panels) with the forward section broken from the model.
True story.